Anticipating an imminent attack by the Huns, Roman leaders negotiate with one of Attila's lieutenants, convincing him to play the part of assassin. He is joined on his mission by a Roman citizen, Jonas, an ambassador dispatched to negotiate a peace treaty with the Huns. When the plot is discovered, Jonas becomes a hostage, forced to fight for his captors if he wishes to remain alive. But he soon learns that Attila intends to conquer Rome itself, and is caught between two mighty empires, both poised for one of the greatest conflicts the world has ever seen. Jonas, knowing his life could be forfeit, has the potential to tip the battle in either direction––and his decision will alter the face of Western civilization.